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Title: Peridynamic Investigation of Shock Wave Decay.

Abstract

Abstract not provided.

Authors:
Publication Date:
Research Org.:
Sandia National Lab. (SNL-CA), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1372749
Report Number(s):
SAND2016-6907D
645878
DOE Contract Number:
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: Proposed for presentation at the Symposium.
Country of Publication:
United States
Language:
English

Citation Formats

Beaver, Logan. Peridynamic Investigation of Shock Wave Decay.. United States: N. p., 2016. Web.
Beaver, Logan. Peridynamic Investigation of Shock Wave Decay.. United States.
Beaver, Logan. 2016. "Peridynamic Investigation of Shock Wave Decay.". United States. doi:. https://www.osti.gov/servlets/purl/1372749.
@article{osti_1372749,
title = {Peridynamic Investigation of Shock Wave Decay.},
author = {Beaver, Logan},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2016,
month = 7
}

Conference:
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  • Propagation of thermal shock wave and of highly transient heat transport phenomena in He II are experimentally investigated with a superconducting temperature sensor. The variation of the wave height of a thermal shock wave during propagation is compared with the prediction of a energy conservation and the Burgers equation. The total amount of energy carried away by a thermal wave from a heating surface is evaluated from the area of the measured wave profile and its variation is investigated with varying heat flux and heating time. It is found that just a small amount of energy is transported through Hemore » II in the form of a second sound wave for the case of large heat flux and long heating time. The rest of the applied energy from the heater is diffusively transported since dense tangled vortices impede ideal heat transport in the second sound mode.« less
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  • Results from experiments that used shock waves generated by a high-power laser to simulate multi-dimensional nuclear shocks are described. The shocks were produced in 50 torr air by irradiating hollow plastic shell targets with 30J, 300 ps Nd-glass laser pulses. The individual near-spherical shocks were investigated to determine over what range the shock radius, R/sub s/, obeyed the Taylor-von-Neumann-Sedov expansion law, R/sub s/..cap alpha..t/sup 2/5/. The relationship was found to hold for 0.9 cm less than or equal to R/sub s/ less than or equal to 2.0 cm. Also, the shocks were modeled with the nuclear effects code RADFLO andmore » good agreement was found between calculation and data for R/sub s/ vs t and also gas and electron densities determined from two-wavelength interferograms of the shock waves. Based on the understanding of the individual shocks, two experiments were designed to investigate two-dimensional shock waves. The first experiment consisted of reflecting a spherical shock off a plastic block suspended 0.9 cm above the target. In the second experiment, two identical spherical shocks were simultaneously generated approx. 1.8 cm apart and allowed to collide. The reflected shocks were compared through scaling laws to the Teapot/Met shock wave generated from a 22 KT nuclear explosion 122 M above the ground. The Mach structures were found to be similar. Then the reflecting and interacting shocks were modeled with a two-dimensional effects code using the one-dimensional RADFLO output to start the problem. Calculation and data for Mach angles and triple point propagation were found to be in good agreement.« less